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Giles-Archer Colour Unit (Aviation Model)
COLOUR VISION TESTS
colour vision test lantern
Europe: United Kingdom
c.1935
metal
overall: 59 mm x 105 mm x 70 mm
1999.3195
COLOUR VISION TESTS
colour vision test lantern
Europe: United Kingdom
c.1935
metal
overall: 59 mm x 105 mm x 70 mm
Black metal cylinder containing electric light bulb. Lens disc attached to side with sliding bar behind it. Seven lenses and one aperture. Dark Red, yellow, signal red, signal yellow, signal green, (?), (?).
1999.3195